The ornamental design for a knife, as shown and described.
Pursuant to 35 U.S.C. 119(a), the instant application is a divisional of U.S. Design Application No. 29/423,751 filed on Jun. 5, 2012, claiming priority to prior Application No. DM/077268 WIPO, filed Dec. 7, 2011.
FIG. 1 is a perspective view of a knife showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof, in an inverted position;
FIG. 4 is an enlarged top plan view of the knife in FIG. 1;
FIG. 5 is an enlarged bottom plan view of thereof;
FIG. 6 is a right side elevation view thereof; and,
FIG. 7 is a left side elevation view thereof.
The broken line showing of the blade is included for the purpose of illustrating environmental structure and forms no part of the claimed design.